video: Add support for RGBA8888 format

Add support for RGBA8888 32bpp format where pixels are picked in
32-bit integers, where the colors are stored in memory such that
R is at lowest address, G after that, B after that, and A last.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/aa1de54b7d4ff46df6858f76d52634e0c5c71a4a.1684312924.git.michal.simek@amd.com
diff --git a/drivers/video/video-uclass.c b/drivers/video/video-uclass.c
index 8396bdf..1b66a80 100644
--- a/drivers/video/video-uclass.c
+++ b/drivers/video/video-uclass.c
@@ -220,14 +220,20 @@
 		break;
 	case VIDEO_BPP32:
 		if (CONFIG_IS_ENABLED(VIDEO_BPP32)) {
-			if (priv->format == VIDEO_X2R10G10B10)
+			switch (priv->format) {
+			case VIDEO_X2R10G10B10:
 				return (colours[idx].r << 22) |
 				       (colours[idx].g << 12) |
 				       (colours[idx].b <<  2);
-			else
+			case VIDEO_RGBA8888:
+				return (colours[idx].r << 24) |
+				       (colours[idx].g << 16) |
+				       (colours[idx].b << 8) | 0xff;
+			default:
 				return (colours[idx].r << 16) |
 				       (colours[idx].g <<  8) |
 				       (colours[idx].b <<  0);
+			}
 		}
 		break;
 	default: